/*
 * Copyright (c) 2022 HPMicro
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

#include "usbd_core.h"
#include "usbd_hid.h"

#define HIDRAW_IN_EP  0x81
#define HIDRAW_OUT_EP 0x02

#define USBD_VID           0xffff
#define USBD_PID           0xffff
#define USBD_MAX_POWER     100
#define USBD_LANGID_STRING 1033

/*!< config descriptor size */
#define USB_CONFIG_SIZE (9 + 9 + 9 + 7 + 7)

/*!< custom hid report descriptor size */
#define HID_CUSTOM_REPORT_DESC_SIZE 38

#ifdef CONFIG_USB_HS
#define HID_MAX_MPS        1024
#define HIDRAW_IN_INTERVAL 1
#else
#define HID_MAX_MPS        64
#define HIDRAW_IN_INTERVAL 1
#endif

#ifdef CONFIG_USBDEV_ADVANCE_DESC
static const uint8_t device_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0002, 0x01)
};

static const uint8_t config_descriptor[] = {
    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
    HID_CUSTOM_INOUT_DESCRIPTOR_INIT(0x00, 0x01, HID_CUSTOM_REPORT_DESC_SIZE, HIDRAW_OUT_EP, HIDRAW_IN_EP, HID_MAX_MPS, HIDRAW_IN_INTERVAL),
};

static const uint8_t device_quality_descriptor[] = {
    ///////////////////////////////////////
    /// device qualifier descriptor
    ///////////////////////////////////////
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x00,
    0x00,
};

static const char *string_descriptors[] = {
    (const char[]){ 0x09, 0x04 }, /* Langid */
    "CherryUSB",                  /* Manufacturer */
    "CherryUSB HID DEMO",         /* Product */
    "2022123456",                 /* Serial Number */
};

static const uint8_t *device_descriptor_callback(uint8_t speed)
{
    return device_descriptor;
}

static const uint8_t *config_descriptor_callback(uint8_t speed)
{
    return config_descriptor;
}

static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
{
    return device_quality_descriptor;
}

static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
{
    if (index > 3) {
        return NULL;
    }
    return string_descriptors[index];
}

const struct usb_descriptor hid_descriptor = {
    .device_descriptor_callback = device_descriptor_callback,
    .config_descriptor_callback = config_descriptor_callback,
    .device_quality_descriptor_callback = device_quality_descriptor_callback,
    .string_descriptor_callback = string_descriptor_callback
};
#else
/*!< global descriptor */
static const uint8_t hid_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0002, 0x01),
    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
    HID_CUSTOM_INOUT_DESCRIPTOR_INIT(0x00, 0x01, HID_CUSTOM_REPORT_DESC_SIZE, HIDRAW_OUT_EP, HIDRAW_IN_EP, HID_MAX_MPS, HIDRAW_IN_INTERVAL),
    /*
     * string0 descriptor
     */
    USB_LANGID_INIT(USBD_LANGID_STRING),
    /*
     * string1 descriptor
     */
    0x14,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'C', 0x00,                  /* wcChar0 */
    'h', 0x00,                  /* wcChar1 */
    'e', 0x00,                  /* wcChar2 */
    'r', 0x00,                  /* wcChar3 */
    'r', 0x00,                  /* wcChar4 */
    'y', 0x00,                  /* wcChar5 */
    'U', 0x00,                  /* wcChar6 */
    'S', 0x00,                  /* wcChar7 */
    'B', 0x00,                  /* wcChar8 */
    /*
     * string2 descriptor
     */
    0x26,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'C', 0x00,                  /* wcChar0 */
    'h', 0x00,                  /* wcChar1 */
    'e', 0x00,                  /* wcChar2 */
    'r', 0x00,                  /* wcChar3 */
    'r', 0x00,                  /* wcChar4 */
    'y', 0x00,                  /* wcChar5 */
    'U', 0x00,                  /* wcChar6 */
    'S', 0x00,                  /* wcChar7 */
    'B', 0x00,                  /* wcChar8 */
    ' ', 0x00,                  /* wcChar9 */
    'H', 0x00,                  /* wcChar10 */
    'I', 0x00,                  /* wcChar11 */
    'D', 0x00,                  /* wcChar12 */
    ' ', 0x00,                  /* wcChar13 */
    'D', 0x00,                  /* wcChar14 */
    'E', 0x00,                  /* wcChar15 */
    'M', 0x00,                  /* wcChar16 */
    'O', 0x00,                  /* wcChar17 */
    /*
     * string3 descriptor
     */
    0x16,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    '2', 0x00,                  /* wcChar0 */
    '0', 0x00,                  /* wcChar1 */
    '2', 0x00,                  /* wcChar2 */
    '2', 0x00,                  /* wcChar3 */
    '1', 0x00,                  /* wcChar4 */
    '2', 0x00,                  /* wcChar5 */
    '3', 0x00,                  /* wcChar6 */
    '4', 0x00,                  /* wcChar7 */
    '5', 0x00,                  /* wcChar8 */
    '6', 0x00,                  /* wcChar9 */
#ifdef CONFIG_USB_HS
    /*
     * device qualifier descriptor
     */
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x00,
    0x00,
#endif
    0x00
};
#endif

/*!< custom hid report descriptor */
static const uint8_t hid_custom_report_desc[HID_CUSTOM_REPORT_DESC_SIZE] = {
#ifdef CONFIG_USB_HS
    /* USER CODE BEGIN 0 */
    0x06, 0x00, 0xff, /* USAGE_PAGE (Vendor Defined Page 1) */
    0x09, 0x01,       /* USAGE (Vendor Usage 1) */
    0xa1, 0x01,       /* COLLECTION (Application) */
    0x85, 0x02,       /*   REPORT ID (0x02) */
    0x09, 0x02,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x25, 0xff,       /*LOGICAL_MAXIMUM (255) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x96, 0xff, 0x03, /*   REPORT_COUNT (63) */
    0x81, 0x02,       /*   INPUT (Data,Var,Abs) */
    /* <___________________________________________________> */
    0x85, 0x01,       /*   REPORT ID (0x01) */
    0x09, 0x03,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x25, 0xff,       /*   LOGICAL_MAXIMUM (255) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x96, 0xff, 0x03, /*   REPORT_COUNT (63) */
    0x91, 0x02,       /*   OUTPUT (Data,Var,Abs) */
    /* USER CODE END 0 */
    0xC0 /*     END_COLLECTION	             */
#else
    /* USER CODE BEGIN 0 */
    0x06, 0x00, 0xff, /* USAGE_PAGE (Vendor Defined Page 1) */
    0x09, 0x01,       /* USAGE (Vendor Usage 1) */
    0xa1, 0x01,       /* COLLECTION (Application) */
    0x85, 0x02,       /*   REPORT ID (0x02) */
    0x09, 0x01,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x26, 0xff, 0x00, /*   LOGICAL_MAXIMUM (255) */
    0x95, 0x40 - 1,   /*   REPORT_COUNT (63) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x81, 0x02,       /*   INPUT (Data,Var,Abs) */
    /* <___________________________________________________> */
    0x85, 0x01,       /*   REPORT ID (0x01) */
    0x09, 0x01,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x26, 0xff, 0x00, /*   LOGICAL_MAXIMUM (255) */
    0x95, 0x40 - 1,   /*   REPORT_COUNT (63) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x91, 0x02,       /*   OUTPUT (Data,Var,Abs) */
    /* USER CODE END 0 */
    0xC0 /*     END_COLLECTION	             */
#endif
};

USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[HID_MAX_MPS];
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t send_buffer[HID_MAX_MPS];

#define HID_STATE_IDLE 0
#define HID_STATE_BUSY 1

/*!< hid state ! Data can be sent only when state is idle  */
static volatile uint8_t custom_state;

static void usbd_event_handler(uint8_t busid, uint8_t event)
{
    switch (event) {
        case USBD_EVENT_RESET:
            break;
        case USBD_EVENT_CONNECTED:
            break;
        case USBD_EVENT_DISCONNECTED:
            break;
        case USBD_EVENT_RESUME:
            break;
        case USBD_EVENT_SUSPEND:
            break;
        case USBD_EVENT_CONFIGURED:
            /* setup first out ep read transfer */
            usbd_ep_start_read(busid, HIDRAW_OUT_EP, read_buffer, HID_MAX_MPS);
            break;
        case USBD_EVENT_SET_REMOTE_WAKEUP:
            break;
        case USBD_EVENT_CLR_REMOTE_WAKEUP:
            break;

        default:
            break;
    }
}

static void usbd_hid_custom_in_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
    (void)busid;
    (void)ep;
    USB_LOG_RAW("actual in len:%d\r\n", (unsigned int)nbytes);
    custom_state = HID_STATE_IDLE;
}

static void usbd_hid_custom_out_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
    USB_LOG_RAW("actual out len:%d\r\n", (unsigned int)nbytes);
    usbd_ep_start_read(busid, ep, read_buffer, HID_MAX_MPS);
    read_buffer[0] = 0x02; /* IN: report id */
    usbd_ep_start_write(busid, HIDRAW_IN_EP, read_buffer, nbytes);
}

static struct usbd_endpoint custom_in_ep = {
    .ep_cb = usbd_hid_custom_in_callback,
    .ep_addr = HIDRAW_IN_EP
};

static struct usbd_endpoint custom_out_ep = {
    .ep_cb = usbd_hid_custom_out_callback,
    .ep_addr = HIDRAW_OUT_EP
};

/* function ------------------------------------------------------------------*/
/**
 * @brief            hid custom init
 * @pre              none
 * @param[in]        none
 * @retval           none
 */
struct usbd_interface intf0;

void hid_custom_init(uint8_t busid, uintptr_t reg_base)
{
#ifdef CONFIG_USBDEV_ADVANCE_DESC
    usbd_desc_register(busid, &hid_descriptor);
#else
    usbd_desc_register(busid, hid_descriptor);
#endif
    usbd_add_interface(busid, usbd_hid_init_intf(busid, &intf0, hid_custom_report_desc, HID_CUSTOM_REPORT_DESC_SIZE));
    usbd_add_endpoint(busid, &custom_in_ep);
    usbd_add_endpoint(busid, &custom_out_ep);

    usbd_initialize(busid, reg_base, usbd_event_handler);
}
